I noticed that Alamy says that images with logos or signs etc can be used as RF as long as the logos are incidental, and not the main part of the image.
I have wondered about this before, as calendar images, and postcards etc often have shop signs, pub signs etc visible.
Is it just the micro signs being paranoid, as none of them as far as I know will accept an image with a logo visible. I spend a lot of time taking the name of a radar that can only be read at 200%!!
The fact is that it will not be accepted at most of the sites and we just have to live with it, but just wondered.